text: /**
   * @fileoverview Disallows or enforces spaces inside of object literals.
   * @author Jamund Ferguson
   */
  "use strict";
  
  const astUtils = require("../util/ast-utils");
  
  //------------------------------------------------------------------------------
  // Rule Definition
  //------------------------------------------------------------------------------
  
  module.exports = {
      meta: {
          docs: {
              description: "enforce consistent spacing inside braces",
              category: "Stylistic Issues",
              recommended: false,
              url: "https://eslint.org/docs/rules/object-curly-spacing"
          },
  
          fixable: "whitespace",
  
          schema: [
              {
                  enum: ["always", "never"]
              },
              {
                  type: "object",
                  properties: {
                      arraysInObjects: {
                          type: "boolean"
                      },
                      objectsInObjects: {
                          type: "boolean"
                      }
                  },
                  additionalProperties: false
              }
          ]
      },
  
      create(context) {
          const spaced = context.options[0] === "always",
              sourceCode = context.getSourceCode();
  
          /**
           * Determines whether an option is set, relative to the spacing option.
           * If spaced is "always", then check whether option is set to false.
           * If spaced is "never", then check whether option is set to true.
           * @param {Object} option - The option to exclude.
           * @returns {boolean} Whether or not the property is excluded.
           */
          function isOptionSet(option) {
              return context.options[1] ? context.options[1][option] === !spaced : false;
          }
  
          const options = {
              spaced,
              arraysInObjectsException: isOptionSet("arraysInObjects"),
              objectsInObjectsException: isOptionSet("objectsInObjects")
          };
  
          //--------------------------------------------------------------------------
          // Helpers
          //--------------------------------------------------------------------------
  
          /**
           * Reports that there shouldn't be a space after the first token
           * @param {ASTNode} node - The node to report in the event of an error.
           * @param {Token} token - The token to use for the report.
           * @returns {void}
           */
          function reportNoBeginningSpace(node, token) {
              context.report({
                  node,
                  loc: token.loc.start,
                  message: "There should be no space after '{{token}}'.",
                  data: {
                      token: token.value
                  },
                  fix(fixer) {
                      const nextToken = context.getSourceCode().getTokenAfter(token);
  
                      return fixer.removeRange([token.range[1], nextToken.range[0]]);
                  }
              });
          }
  
          /**
           * Reports that there shouldn't be a space before the last token
           * @param {ASTNode} node - The node to report in the event of an error.
           * @param {Token} token - The token to use for the report.
           * @returns {void}
           */
          function reportNoEndingSpace(node, token) {
              context.report({
                  node,
                  loc: token.loc.start,
                  message: "There should be no space before '{{token}}'.",
                  data: {
                      token: token.value
                  },
                  fix(fixer) {
                      const previousToken = context.getSourceCode().getTokenBefore(token);
  
                      return fixer.removeRange([previousToken.range[1], token.range[0]]);
                  }
              });
          }
  
          /**
           * Reports that there should be a space after the first token
           * @param {ASTNode} node - The node to report in the event of an error.
           * @param {Token} token - The token to use for the report.
           * @returns {void}
           */
          function reportRequiredBeginningSpace(node, token) {
              context.report({
                  node,
                  loc: token.loc.start,
                  message: "A space is required after '{{token}}'.",
                  data: {
                      token: token.value
                  },
                  fix(fixer) {
                      return fixer.insertTextAfter(token, " ");
                  }
              });
          }
  
          /**
           * Reports that there should be a space before the last token
           * @param {ASTNode} node - The node to report in the event of an error.
           * @param {Token} token - The token to use for the report.
           * @returns {void}
           */
          function reportRequiredEndingSpace(node, token) {
              context.report({
                  node,
                  loc: token.loc.start,
                  message: "A space is required before '{{token}}'.",
                  data: {
                      token: token.value
                  },
                  fix(fixer) {
                      return fixer.insertTextBefore(token, " ");
                  }
              });
          }
  
          /**
           * Determines if spacing in curly braces is valid.
           * @param {ASTNode} node The AST node to check.
           * @param {Token} first The first token to check (should be the opening brace)
           * @param {Token} second The second token to check (should be first after the opening brace)
           * @param {Token} penultimate The penultimate token to check (should be last before closing brace)
           * @param {Token} last The last token to check (should be closing brace)
           * @returns {void}
           */
          function validateBraceSpacing(node, first, second, penultimate, last) {
              if (astUtils.isTokenOnSameLine(first, second)) {
                  const firstSpaced = sourceCode.isSpaceBetweenTokens(first, second);
  
                  if (options.spaced && !firstSpaced) {
                      reportRequiredBeginningSpace(node, first);
                  }
                  if (!options.spaced && firstSpaced) {
                      reportNoBeginningSpace(node, first);
                  }
              }
  
              if (astUtils.isTokenOnSameLine(penultimate, last)) {
                  const shouldCheckPenultimate = (
                      options.arraysInObjectsException && astUtils.isClosingBracketToken(penultimate) ||
                      options.objectsInObjectsException && astUtils.isClosingBraceToken(penultimate)
                  );
                  const penultimateType = shouldCheckPenultimate && sourceCode.getNodeByRangeIndex(penultimate.range[0]).type;
  
                  const closingCurlyBraceMustBeSpaced = (
                      options.arraysInObjectsException && penultimateType === "ArrayExpression" ||
                      options.objectsInObjectsException && (penultimateType === "ObjectExpression" || penultimateType === "ObjectPattern")
                  ) ? !options.spaced : options.spaced;
  
                  const lastSpaced = sourceCode.isSpaceBetweenTokens(penultimate, last);
  
                  if (closingCurlyBraceMustBeSpaced && !lastSpaced) {
                      reportRequiredEndingSpace(node, last);
                  }
                  if (!closingCurlyBraceMustBeSpaced && lastSpaced) {
                      reportNoEndingSpace(node, last);
                  }
              }
          }
  
          /**
           * Gets '}' token of an object node.
           *
           * Because the last token of object patterns might be a type annotation,
           * this traverses tokens preceded by the last property, then returns the
           * first '}' token.
           *
           * @param {ASTNode} node - The node to get. This node is an
           *      ObjectExpression or an ObjectPattern. And this node has one or
           *      more properties.
           * @returns {Token} '}' token.
           */
          function getClosingBraceOfObject(node) {
              const lastProperty = node.properties[node.properties.length - 1];
  
              return sourceCode.getTokenAfter(lastProperty, astUtils.isClosingBraceToken);
          }
  
          /**
           * Reports a given object node if spacing in curly braces is invalid.
           * @param {ASTNode} node - An ObjectExpression or ObjectPattern node to check.
           * @returns {void}
           */
          function checkForObject(node) {
              if (node.properties.length === 0) {
                  return;
              }
  
              const first = sourceCode.getFirstToken(node),
                  last = getClosingBraceOfObject(node),
                  second = sourceCode.getTokenAfter(first),
                  penultimate = sourceCode.getTokenBefore(last);
  
              validateBraceSpacing(node, first, second, penultimate, last);
          }
  
          /**
           * Reports a given import node if spacing in curly braces is invalid.
           * @param {ASTNode} node - An ImportDeclaration node to check.
           * @returns {void}
           */
          function checkForImport(node) {
              if (node.specifiers.length === 0) {
                  return;
              }
  
              let firstSpecifier = node.specifiers[0];
              const lastSpecifier = node.specifiers[node.specifiers.length - 1];
  
              if (lastSpecifier.type !== "ImportSpecifier") {
                  return;
              }
              if (firstSpecifier.type !== "ImportSpecifier") {
                  firstSpecifier = node.specifiers[1];
              }
  
              const first = sourceCode.getTokenBefore(firstSpecifier),
                  last = sourceCode.getTokenAfter(lastSpecifier, astUtils.isNotCommaToken),
                  second = sourceCode.getTokenAfter(first),
                  penultimate = sourceCode.getTokenBefore(last);
  
              validateBraceSpacing(node, first, second, penultimate, last);
          }
  
          /**
           * Reports a given export node if spacing in curly braces is invalid.
           * @param {ASTNode} node - An ExportNamedDeclaration node to check.
           * @returns {void}
           */
          function checkForExport(node) {
              if (node.specifiers.length === 0) {
                  return;
              }
  
              const firstSpecifier = node.specifiers[0],
                  lastSpecifier = node.specifiers[node.specifiers.length - 1],
                  first = sourceCode.getTokenBefore(firstSpecifier),
                  last = sourceCode.getTokenAfter(lastSpecifier, astUtils.isNotCommaToken),
                  second = sourceCode.getTokenAfter(first),
                  penultimate = sourceCode.getTokenBefore(last);
  
              validateBraceSpacing(node, first, second, penultimate, last);
          }
  
          //--------------------------------------------------------------------------
          // Public
          //--------------------------------------------------------------------------
  
          return {
  
              // var {x} = y;
              ObjectPattern: checkForObject,
  
              // var y = {x: 'y'}
              ObjectExpression: checkForObject,
  
              // import {y} from 'x';
              ImportDeclaration: checkForImport,
  
              // export {name} from 'yo';
              ExportNamedDeclaration: checkForExport
          };
  
      }
  };
  